I have a B&W ASW850 subwoofer that is rattling in the 20-40Hz range (tested with a signal generator). Although I have never consciously over driven the unit, I assume this just means the voice coil is shot and I need to replace the speaker? How easy is this to do?
06-22-12: Lloydelee21 Hmmm...if the whole thing needs to be replaced...sometimes they do that...the voice coil, magnet, etc...that probably is a good portion of the sub. I think it is pretty straight forward...just might be expensive. i am NO techie...so i admit i could well be wrong, but i have replaced entire cones, a tiny inexpensive one can be 20-50 bucks...an expensive one can run a few hundred. Lloydelee21 (Reviews | Threads | Answers | This Thread)
06-23-12: Sidssp What do you mean by rattling? Have you tried to push on the cone to see if the voice coil is actually touching the magnet? If you have never driven it hard, it is possible that the problem is in the built-in amp and not the voice coil. Sidssp (System | Threads | Answers | This Thread)
06-24-12: Mgattmch It's the speaker that is faulty. I took it out the cabinet and hooked it up to another amplifier (Quad 606 MkII) and signal generator. Sure enough, it started rattling badly below 52Hz. Here goes ~$700 to order a replacement speaker (p/n ZZ14102) from B&W NA. Mgattmch (Threads | Answers | This Thread)
07-28-12: Mgattmch Turns out the spider had come un-glued from part of the cone, the voice coil is undamaged. In the end I purchased a new subwoofer from B&W ($700) and everything works fine now. Allen Speaker Reconing in Houston are repairing the original speaker for me now and I will either keep it as a spare or sell it on. Mgattmch (Threads | Answers | This Thread)
01-26-13: Matjet Rattle could be one of the following: 1) Vibration/rattle of nearby furniture, wall hangings, wall or floor 2) Vibration/rattle of a loose speaker grill 3) Driver could be striking/rattling the speaker grill with long excursion if over driven (reduce the power if this is the case) 4) Blown driver Check all possibilities before replacing the driver. Good luck! Matjet (Threads | Answers | This Thread)